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First time poster! Looking to fix up an old Vibiemme Domobar...help!
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bsto
Senior Member
bsto
Joined: 26 Jan 2014
Posts: 3
Location: Berlin
Expertise: I love coffee

Espresso: Rancilio Silvia/Vibiemme...
Grinder: Gaggia MDF
Posted Sun Jan 26, 2014, 10:08am
Subject: First time poster! Looking to fix up an old Vibiemme Domobar...help!
 

Hey CGs - been lurking for a while but finally taking the plunge to see if you can help me fix up my girlfriend's old Vibiemme Domobar.

I attached a few photos I took of the backend because I don't see any OPV valve. There's nothing like the easy to reach pressure adjustment on newer VBMs. So how do I adjust pressure?

Shots started coming out crazy fast and hard - and I've already messed with grind and temperature so I don't think it's that. I think it's time to get into the nitty gritty. I appreciate your help!

bsto: domobar back 1.jpg
(Click for larger image)
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frcn
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frcn
Joined: 23 Dec 2001
Posts: 3,411
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
Grinder: Mazzer Kony, Baratza...
Vac Pot: Hario, 2 Cory pots, 1 Cory...
Drip: Behmor Brazen, Bunn A10 mod...
Roaster: computer controlled Hottop,...
Posted Sun Jan 26, 2014, 11:32am
Subject: Re: First time poster! Looking to fix up an old Vibiemme Domobar...help!
 

I believe that the "Tee" brass part with the silicone hose coming off if it is the relief valve. There should be a screw slot on top that is the adjustment. BUT..

The scale on the pump's output indicates that there are other problems that need addressing. If I got that machine I would disassemble it and descale the boiler which I think you will find has a good scale deposit inside. The reson for disassembling it is that the scale will clog the machine (particularly the group's gicleur) if standard descaling procedures are
followed.

For more detail on the E-61 group, see these two articles on my website:
How-To 18 - Simple Lubrication of the E-61 Group
How-To 19 - Overhauling and Lubricating the E-61 Group

 
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bsto
Senior Member
bsto
Joined: 26 Jan 2014
Posts: 3
Location: Berlin
Expertise: I love coffee

Espresso: Rancilio Silvia/Vibiemme...
Grinder: Gaggia MDF
Posted Mon Jan 27, 2014, 4:00am
Subject: Re: First time poster! Looking to fix up an old Vibiemme Domobar...help!
 

Thanks. Definitely looks like a weekend project!
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bsto
Senior Member
bsto
Joined: 26 Jan 2014
Posts: 3
Location: Berlin
Expertise: I love coffee

Espresso: Rancilio Silvia/Vibiemme...
Grinder: Gaggia MDF
Posted Sun Feb 2, 2014, 4:19am
Subject: Re: First time poster! Looking to fix up an old Vibiemme Domobar...help!
 

There's no screw slot - where does one adjust OPV (or maybe pressure adjustment is somewhere else?) on this generation Domobar? Before I do any disassembling, I'd like to see if pressure adjustments change anything.

But it's interesting: I did a standard descale a month or so ago. I wonder if that actually exacerbated the pressure issues.
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CSME9
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CSME9
Joined: 26 Feb 2004
Posts: 286
Location: West Texas
Expertise: I live coffee

Espresso: Bezzera Mitica Top, Spaz...
Grinder: Rancilio Rocky
Drip: Moka Pot
Roaster: BBQ Roaster
Posted Sun Feb 2, 2014, 7:02am
Subject: Re: First time poster! Looking to fix up an old Vibiemme Domobar...help!
 

bsto Said:

Hey CGs - been lurking for a while but finally taking the plunge to see if you can help me fix up my girlfriend's old Vibiemme Domobar.

I attached a few photos I took of the backend because I don't see any OPV valve. There's nothing like the easy to reach pressure adjustment on newer VBMs. So how do I adjust pressure?

Shots started coming out crazy fast and hard - and I've already messed with grind and temperature so I don't think it's that. I think it's time to get into the nitty gritty. I appreciate your help!

Posted January 26, 2014 link

The OPV looks like the old Isomac type with the attached clear hose , remove the hose and cover the barrel so it doesn't get damaged & turn the brass barrel  with pliers clockwise to increase pressure. If you look carefully you can see a round lip edge at the end of the hose which sometimes you can grab it there with the pliers to adjust.
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,781
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Tue Feb 4, 2014, 6:54am
Subject: Re: First time poster! Looking to fix up an old Vibiemme Domobar...help!
 

Randy, good eye on the scale on the pump, nice catch :D

 
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